The 29,112 dwt freighter Costis is reported disabled off the southwest coast of Taiwan.   The vessel lost power after it suffered a water ingress flooding the engine room.   The Costis sent out a distress signal which was received by the Taiwanese Air Force.  The Air Force dispatched two S-70C helicopters to rescue the Costis’s crew.   The helicopters airlifted 13 of the 17 crewmen aboard the Costis.  The master, chief engineer and three other crewmen decided to stay on board the Costis in an attempt to save the vessel.   Reports state the Costis had a cargo of raw cement materials.